A 17-year-old boy was killed early Sunday in Milton after the car he was travelling in overturned and hit a utility pole, and then a truck rolled over on the ice of Lake Simcoe.

Police work at the scene of a fatal crash in Milton Sunday. a 17-year-old boy is dead and three others are in hospital after the car rolled over on Fifth Line, south of Britannia Rd. at about 1:20 a.m.

Rollovers by two separate vehicles in Greater Toronto on Sunday killed two people and injured seven others.

In the first incident, a 17-year-old boy was killed shortly after 1 a.m. in Milton after the car he was travelling in overturned and hit a utility pole, Halton police said.

The 18-year-old male driver and two other passengers — females whose ages were not revealed — were sent to hospital with serious injuries, police said in a news release Sunday afternoon.

The incident happened on Fifth Line, south of Britannia Rd., where police said the Pontiac Grand Prix was southbound before the driver lost control.

It eventually came to rest in a nearby field, where the 17-year-old boy was pronounced dead at the scene.

Halton EMS said those injured were transported to St. Michael's Hospital and Hamilton General Hospital.

The three remained in hospital as of Sunday afternoon in “serious but stable condition,” police said.

Those with relevant information are encouraged to contact authorities.

In the day's other fatal crash, one person died and another was directly airlifted to hospital after a truck rolled over on the frozen Lake Simcoe near Beaverton Sunday.

The pickup truck was driving on the lake, about three kilometres from shore in the Thorah Island area, when it struck a break in the ice and lost control, Durham Regional Police said. Five people were in the truck and several were ejected when the crash occurred at about 4:30 p.m.

A 32-year-old woman was found without vital signs, while the 51-year-old male driver was flown to Sunnybrook hospital with non-life-threatening injuries to his head and arms, an ORNGE spokeswoman said.

One man was rushed to hospital in Orillia and then also airlifted to Sunnybrook, while another man was taken to Uxbridge Cottage Hospital with non-life-threatening injuries.

The fourth man was taken to hospital in Orillia with minor injuries. The DRPS were investigating at the scene.